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Neither Facebook or Twitter definitively linked the activities to Iranian authorities, but Facebook said some of the content recycled talking points from Iranian state media | Kirill Kudryavtsev/AFP/Getty Images

Twitter and Facebook Thursday separately announced they're both taking down hundreds of pages linked to disinformation campaigns originating from Iran, Russia and Venezuela and targeting a wide swath of countries.

Iran was the source of the bulk of the activity that each platform targeted. Twitter removed 2,617 "malicious accounts" that may have originated in Iran, the company said in a blog post. Facebook said in its own blog post that it suspended 783 Iranian pages and accounts on its platforms, including Instagram, for "engaging in coordinated inauthentic behavior."

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Neither definitively linked the activities to Iranian authorities, but Facebook said some of the content recycled talking points from Iranian state media on topics like the U.S.'s role in conflicts in Syria and Yemen and Israeli-Palestinian relations. Though the Facebook activity primarily targeted the Middle East and South Asia, it also spanned across countries in North America, Africa and Europe, including the U.S., Mexico, Egypt, Sudan, France and Germany.

Twitter also suspended 418 accounts that appeared to originate in Russia and that mimicked the behavior of the Internet Research Agency — though the social network couldn't definitively establish a link to that notorious Russian troll farm.

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And Twitter said it also took down roughly 2,000 accounts located in Venezuela, more than half of which appeared to be engaged in a "state-backed influence campaign targeting domestic audiences."

Facebook said it notified U.S. law enforcement, lawmakers and officials in other impacted countries of its findings. Both companies said they coordinated with industry peers to root out some of the activity.

The announcements come amid heightened global scrutiny of social media firms' efforts to curb online disinformation and better protect consumer data. Facebook's reveal in particular comes during a bruising public relations cycle for the already embattled company, which just this week has seen an earnings outperformance overshadowed by blowback over a report that it has paid users as young as 13 to monitor all activity on their mobile phones.